A tsunami is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and underwater explosions above or below water all have the potential to generate a tsunami. Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of water from a large event.
A megatsunami is a very large wave created by a large, sudden displacement of material into a body of water.
Disko Bay is a large bay on the western coast of Greenland. The bay constitutes a wide southeastern inlet of Baffin Bay.
Pingos are intrapermafrost ice-cored hills, 3–70 m (10–230 ft) high and 30–1,000 m (98–3,281 ft) in diameter. They are typically conical in shape and grow and persist only in permafrost environments, such as the Arctic and subarctic. A pingo is a periglacial landform, which is defined as a non-glacial landform or process linked to colder climates. It is estimated that there are more than 11,000 pingos on Earth, with the Tuktoyaktuk peninsula area having the greatest concentration at a total of 1,350. There is currently limited data on pingos.
Saqqaq is a settlement in the Avannaata municipality in western Greenland. Founded in 1755 as Solsiden, Saqqaq had 132 inhabitants in 2020. The village's Kalaallisut name is a translation of the Danish meaning "Sunny Side", in reference to its position relative to Livets Top.
Illorsuit is a former settlement in Avannaata municipality, in western Greenland. Located on the northeastern shore of Illorsuit Island − northwest of Uummannaq at the mouth of the Uummannaq Fjord − the settlement had 91 inhabitants in 2010. It was abandoned in 2018.
Nuugaatsiaq is a settlement in the Avannaata municipality, in northwestern Greenland, located on an island off the southern coast of Sigguup Nunaa peninsula, in the Uummannaq Fjord basin. It had 84 inhabitants in 2010, but was abandoned after a tsunami struck in 2017.
Alluttoq Island is a large 655 km2 (252.9 sq mi), uninhabited island in Avannaata municipality in western Greenland, located in the northern part of Disko Bay, in the outlet of the Sullorsuaq Strait, east of Disko Island.
Ella Island is an island in eastern Greenland, within Northeast Greenland National Park. It was established in 1941 to enforce Danish sovereignty in Greenland.. It is home of the legendary Sirius Dog Sled Patrol.
Nuussuaq Peninsula is a large peninsula in western Greenland.
Qullissat is a former settlement in the Qeqertalik municipality, located on the northeast coast of Disko Island on the west coast of Greenland. It was a coal mining town founded to exploit the natural resources of Disko Island. The mines operated for 48 years until 1972, when the economic base of the settlement collapsed, leading to its abandonment.
Sullorsuaq Strait is a strait on the western coast of Greenland.
Upernavik Archipelago is a vast coastal archipelago in the Avannaata municipality in northwestern Greenland, off the shores of northeastern Baffin Bay. The archipelago extends from the northwestern coast of Sigguup Nunaa peninsula in the south at approximately 71°50′N56°00′W to the southern end of Melville Bay in the north at approximately 74°50′N57°30′W.
Diuronotus aspetos is a species of large sized meiofaunal chaetonotid gastrotrich found in the North Atlantic. With Diuronotus rupperti, it is one of the only two species representing the genus Diuronotus.
Karrat Fjord is a fjord in Avannaata municipality in western Greenland.
The island of La Palma in the Canary Islands is at risk of undergoing a large landslide, which could cause a tsunami in the Atlantic Ocean. Volcanic islands and volcanoes on land frequently undergo large landslides/collapses, which have been documented in Hawaii for example. A recent example is Anak Krakatau, which collapsed to cause the 2018 Sunda Strait tsunami.
The 1674 Ambon earthquake occurred on February 17 between 19:30 and 20:00 local time in the Maluku Islands. The resulting tsunami reached heights of up to 100 metres (330 ft) on Ambon Island killing over 2,000 individuals. It was the first detailed documentation of a tsunami in Indonesia and the largest ever recorded in the country. The exact fault which produced the earthquake has never been determined, but geologists postulate either a local fault, or a larger thrust fault offshore. The extreme tsunami was likely the result of a submarine landslide.
The devastating eruption of Oshima–Ōshima began on 18 August 1741 and ended on 1 May the next year. Eleven days into the eruption, the Kampo tsunami with estimated maximum heights of over 90 m (300 ft) swept across neighboring islands in Japan and the Korean Peninsula. The eruption and its resulting tsunami killed at least 1,400 people. Damage was extreme along the coast of Japan, while in Korea, the tsunami damaged fishing boats.
On September 16, 2023, a massive landslide occurred in Dickson Fjord, northeastern Greenland. It was triggered by a series of factors. Greenland, being highly sensitive to rising temperatures, has experienced accelerated glacial retreat and destabilization in recent years, making landslides more frequent and severe.
![Native iron from Disko Island (size: 4.9 x 2.9 x 1.5 cm [1.9 in. x1.1 in. x 0.6 in.]) Iron-sea07a.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Iron-sea07a.jpg/220px-Iron-sea07a.jpg)
